An error occurred while signing: SignTool.exe not found

Question

While I was trying to Update my Project I was making - I got an error for the first time I\'ve seen:

\'An error occurred while signing: SignTool.exe n

Answer 1

Reinstalling SDK did not help me but installing SDK+.NET 3.5 did from link below: https://www.microsoft.com/en-us/download/details.aspx?id=3138